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WO2012178198A2 - Appareil d'éclairage à diodes électroluminescentes doté d'un dispositif s'ajustant par pression qui reçoit un dissipateur de chaleur - Google Patents

Appareil d'éclairage à diodes électroluminescentes doté d'un dispositif s'ajustant par pression qui reçoit un dissipateur de chaleur Download PDF

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Publication number
WO2012178198A2
WO2012178198A2 PCT/US2012/044076 US2012044076W WO2012178198A2 WO 2012178198 A2 WO2012178198 A2 WO 2012178198A2 US 2012044076 W US2012044076 W US 2012044076W WO 2012178198 A2 WO2012178198 A2 WO 2012178198A2
Authority
WO
WIPO (PCT)
Prior art keywords
socket
led
light fixture
led light
circuit board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2012/044076
Other languages
English (en)
Other versions
WO2012178198A3 (fr
Inventor
Sherman Gingerella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2012178198A2 publication Critical patent/WO2012178198A2/fr
Publication of WO2012178198A3 publication Critical patent/WO2012178198A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/005—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with keying means, i.e. for enabling the assembling of component parts in distinctive positions, e.g. for preventing wrong mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/022—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a floor or like ground surface, e.g. pavement or false floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F21S8/036—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade by means of a rigid support, e.g. bracket or arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
    • F21V21/0824—Ground spikes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to lamps, and in particular to LED light fixtures.
  • Outdoor landscape lighting is extremely popular for both residences and businesses in modern society.
  • An outdoor landscape lighting system typically utilizes a transformer to reduce standard voltage from 120 volts to a safe 12 volts in order to eliminate risk of electric shock to children or animals if the cable is accidentally cut.
  • FIG. 1 shows an exploded view of prior art halogen light fixture 1 of the type typically used for landscape lighting.
  • Halogen filament 4 is mounted inside lamp reflector 2.
  • Power pins 3 extend downward from lamp holder 2a.
  • Socket 5 is mounted into light fixture 6.
  • Socket 5 shields cord 7 from heat of filament 4.
  • Cord 7 extends from socket 5 and is connected to a low voltage AC source.
  • Shroud 8 with glass lens 9 attaches to the top of fixture 6 and covers and protects lamp 4b.
  • FIG. 2 shows an assembled view of prior art halogen light fixture 1.
  • Halogen light fixture 1 is very popular and widely available. However, halogen lamp 4 gets very hot, has a relatively short life span and has to be replaced frequently.
  • LED Light Emitting Diode
  • FIG. 3 shows prior art halogen light fixture 11 with LED retrofit lamp 12. Because an LED lamp has a longer life span than a corresponding halogen lamp, a prior art solution for the short life of the halogen lamp is to replace the lamp with LED lamp 12. An LED lamp will last longer provided that the bulb is operated within specific parameters. LED lamps are sensitive to high temperatures. Unfortunately, heat is trapped by shroud 8 and blocked by socket 5. The high temperature can quickly degrade LED lamp 12 causing it to fail or perform poorly. LED Light Fixture with Fixture Housing Heat Sink
  • FIG. 4 shows an exploded view of LED light fixture 15.
  • LED light fixture 15 includes fixture housing 16, LED circuit board 17 with LEDs 23, screws 19, optics 20, shroud 21 and fitting 22.
  • LED circuit board 17 is screwed onto brass fixture housing 16.
  • Optics 20 align and rest on LED circuit board and is held in place by shroud 21.
  • significant heat is not retained in the air adjacent LEDs 23. Rather, fixture housing 16 becomes a heat sink and the heat is dissipated through fixture housing 16 and travels downward away from LEDs 23. Longer life and better performance for the LEDs are achieved.
  • light fixture 15 can be difficult and time consuming to initially fabricate and difficult to service if a replacement of LED circuit board 17 is required.
  • Screws 19 can become misaligned, lost and corroded. Also, LED circuit board 17 can be improperly installed resulting in damage during the installation process. It is particularly difficult to attach screws 19 during a field servicing of LED light fixture 15 where the lamp servicer may have to contend with less than optimum conditions during the servicing operation.
  • the present invention provides an LED light fixture.
  • a fixture housing includes a socket- receiving cutout section.
  • a socket is held within the socket-receiving cutout section.
  • An LED circuit board is connected to an LED circuit board holder.
  • the LED circuit board holder includes an insertion piece.
  • the insertion piece is inserted into the socket-receiving cutout section and fits over the socket so that the connection pins from the LED circuit board are inserted into the socket.
  • the insertion piece is press-fit into the socket-receiving cutout section and is held in place by friction force between the insertion piece and the socket- receiving cutout section.
  • a thermally conductive pathway is established between the LEDs on the LED circuit board, the circuit board holder and the fixture housing. Heat generated by the LEDs travel through the circuit board and through the fixture housing.
  • a T-slot is cut into the insertion piece to make it more bendable and to facilitate its insertion and removal from the socket-receiving cutout section.
  • FIGS. 1 - 4 show prior art lamps.
  • FIGS. 5 - 18 show a preferred embodiment of the present invention.
  • FIG. 19 shows another preferred embodiment of the present invention.
  • FIGS. 20 - 24 show preferred uses of preferred embodiments of the present invention.
  • FIG. 5 shows a perspective view
  • FIG. 6 shows a side view of socket 31 inserted through fixture housing 32.
  • Fixture housing 32 includes socket-receiving cutout section 33.
  • Socket- receiving cutout section 33 preferably has a circular cross section with a diameter large enough and a depth deep enough to fully receive socket 31.
  • LED holder 36 has been positioned to the left of fixture housing 32.
  • LED holder 36 is preferably fabricated from aluminum (FIGS. 9 - 11).
  • LED circuit board 37 is mounted to the top of LED holder 36 with thermally conductive interface. Pins 38 extend through hole 41 and allow for electrical connection to socket 31.
  • LED holder 36 includes tubular insertion piece 39 attached to its bottom.
  • T-slot 40 is preferably cut into insertion piece 39.
  • T-slot 40 makes it easier to bend insertion piece 39 as it is inserted into socket-receiving cutout section 33 of fixture housing 32.
  • Insertion piece 39 has been partially inserted into socket-receiving cutout section 33 of fixture housing 32. Insertion piece 39 presses tightly against the sides of socket-receiving cutout section 33 causing insertion piece to bend slightly as it is being inserted to accommodate the size of the socket-receiving cutout section. Insertion piece 39 fits around socket 33 as it is being inserted. Pins 38 are properly aligned with socket holes 44 for insertion as holder 36 is being inserted into socket-receiving cutout section 33.
  • insertion piece 39 has been fully press-fit and inserted into socket-receiving cutout section 33 of fixture housing 32 and optics section 50 is positioned next to holder 36.
  • the bendability of insertion piece 39 (which has been increased by the utilization of T-slot 40 as explained above) has increased the ease of insertion.
  • a friction force between insertion piece 39 and socket-receiving cutout section 33 holds holder 36 tightly in place against fixture housing 32.
  • FIG. 14 there is now a thermally conductive pathway for heat to travel to the right from LEDs 47 through fixture housing 32 (which now functions as a very efficient heat sink).
  • the friction force maintaining holder 36 tightly in place against fixture housing 32 is of sufficient strength such that holder 36 will be retained in this position during operation of the lamp.
  • the friction force can be easily overcome by a user manipulating holder 36 and fixture housing 32 with his fingers and hands in a fashion similar to that described above.
  • optics section 50 has been press fit onto holder 36 so that optical lenses 51 are positioned over LEDs 47. Friction force between optics section 50 and holder 36 holds optics section 50 in place against holder 36.
  • shroud 55 has been positioned next to fixture housing 32.
  • shroud 55 has been threaded onto fixture housing 32. LEDs 47 are now enclosed within shroud 55.
  • FIG. 18 fitting 60 has been attached to fixture housing 32.
  • Fixture housing 32 is shown functioning as a heat sink. Heat generated by LEDs 47 travels through LED circuit board 37 to holder 36 to fixture housing 32 and through fitting 60 and out into the surrounding environment. Very little heat is retained within shroud 55. This allows LEDs 47 to operate at higher temperatures and for longer periods of time with little or no degradation.
  • FIG. 19 shows DC lamp 71.
  • LED 47 is mounted to LED circuit board 98.
  • LED circuit board 98 is mounted to holder 36.
  • Insertion piece 39 extends downward from holder 36 and includes T-slot 40.
  • Socket 81 fits inside socket-receiving cutout section 94 of fixture housing 91.
  • Socket 81 includes key 85. Key 85 is positioned such that it forces pins 99 to properly align with holes 100 to establish the correct polarity for the DC connection.
  • optics section 30 includes an alignment feature so that the optics lenses are properly positioned over the LEDs.
  • FIG. 25 shows optics section 83 with alignment groove 84 positioned over holder 96 with alignment tongue 97.
  • FIGS. 26 - 28 illustrate how the optics alignment feature is used.
  • FIG. 26 shows LED circuit board 77 with LEDs 23 mounted and groove 76.
  • FIG. 27 shows LED circuit board 77 inserted into holder 96. Groove 76 has been aligned with tongue 97 so LEDs 23 are aligned as shown.
  • FIG. 28 shows optics section 83 inserted into holder 96 over LED circuit board 77. Groove 84 has been aligned with tongue 97 so that optics lenses 85 are aligned over LEDs 23 as shown.
  • FIGS. 20 - 24 show a variety of uses for a lamp in which holder 36 includes an insertion piece that has been press fit into a fixture housing for the purpose of providing a heat sink.
  • the LED circuit board operates at a low temperature allowing for longer lamp operations without needing to repair or replace the lamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Led Device Packages (AREA)

Abstract

La présente invention se rapporte à un appareil d'éclairage à diodes électroluminescentes. Un boîtier d'appareil comprend une section échancrée qui reçoit la douille. Une douille est retenue dans la section échancrée qui reçoit la douille. Une carte de circuit imprimé de diode électroluminescente est raccordée à un support de carte de circuit de diode électroluminescente. Le support de circuit imprimé de diode électroluminescente comprend un élément d'insertion. L'élément d'insertion est inséré dans la section échancrée qui reçoit la douille et se fixe sur la douille de telle sorte que les broches de connexion de la carte de circuit imprimé de diode électroluminescente soient insérées dans la douille. L'élément d'insertion est ajusté par pression dans la section échancrée qui reçoit la douille et est maintenu en place par une force de frottement entre l'élément d'insertion et la section échancrée qui reçoit la douille. Un trajet thermoconducteur est établi entre les diodes électroluminescentes agencées sur la carte de circuit imprimé de diode électroluminescente, le support de carte de circuit imprimé et l'appareil d'éclairage. La chaleur générée par les diodes électroluminescentes se propage à travers la carte de circuit imprimé et à travers le boîtier de l'appareil. Selon un mode de réalisation préféré, une fente en forme de T est découpée dans l'élément d'insertion pour la rendre plus facile à plier et pour faciliter son insertion dans la section échancrée qui reçoit la douille, et son retrait de cette dernière.
PCT/US2012/044076 2011-06-23 2012-06-25 Appareil d'éclairage à diodes électroluminescentes doté d'un dispositif s'ajustant par pression qui reçoit un dissipateur de chaleur Ceased WO2012178198A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/167,046 2011-06-23
US13/167,046 US20120324772A1 (en) 2011-06-23 2011-06-23 Led light fixture with press-fit fixture housing heat sink

Publications (2)

Publication Number Publication Date
WO2012178198A2 true WO2012178198A2 (fr) 2012-12-27
WO2012178198A3 WO2012178198A3 (fr) 2013-02-21

Family

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Family Applications (1)

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PCT/US2012/044076 Ceased WO2012178198A2 (fr) 2011-06-23 2012-06-25 Appareil d'éclairage à diodes électroluminescentes doté d'un dispositif s'ajustant par pression qui reçoit un dissipateur de chaleur

Country Status (2)

Country Link
US (1) US20120324772A1 (fr)
WO (1) WO2012178198A2 (fr)

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US9366422B2 (en) 2012-03-22 2016-06-14 Makersled Llc Slotted heatsinks and systems and methods related thereto

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US9366422B2 (en) 2012-03-22 2016-06-14 Makersled Llc Slotted heatsinks and systems and methods related thereto

Also Published As

Publication number Publication date
WO2012178198A3 (fr) 2013-02-21
US20120324772A1 (en) 2012-12-27

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